It’s quite funny that Boulez, who as a conductor had such a reputation for fidelity to text, may not have been entirely faithful to his own scores.

I mean, it’s like what people always ask myself also, “Do you love playing your works? Doesn’t it feel good, or what does it do to you?” I personally interpret my own works exactly in the same way as a Bruckner symphony, or a Schubert symphony, or a piece by Boulez. When I’m asked to perform a work of myself that goes way back, more than a handful of years or even more than 10 years, I really have to sit down and learn the score. With Pierre it was the same.

Of course we had conversations about “Dérive 2.” He was making jokes like: Woah, tonight “Dérive 2,” oof, buckle up, roll up your sleeves. He said this in his most charming and witty way. But yes, it’s a big piece, it’s a long piece, it is very demanding, it is very challenging. It’s like Ravel: Everything is wonderfully logical, but once you abandon that and you forget about the structure and how it has been built, you can really immerse yourself in the energy and the flow of that music.

You conduct a huge amount of new music. Does Boulez — and more broadly the Darmstadt School-era composers like Nono and Stockhausen, who shot to prominence in the 1950s — still have a definable influence on composition today, especially on young composers?

That’s a big question, huh? I think we have to understand that the significance, the legacy of a composer cannot be measured by the statistics of how many performances a composer or a certain piece has at a certain time. It’s like those works are landmarks for their time — as is the “Goldberg” Variations. I don’t know how many times the “Goldberg” Variations are being performed worldwide, daily.

It’s a reference. It adds to the roots of music history, as we understand that the very late Brahms becomes the early Schoenberg, the very late Schubert becomes the very early Bruckner, and the very late Stravinsky becomes Pierre Boulez. If you look at “Threni,” for example, by Stravinsky, there is some sort of transition to where Boulez picks it up, and I think those links in music history are fascinating and important.